JP3064443B2 - Music signal generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a MIDI (Music).
cal Instrument Digi-tal I
a musical tone signal generation device provided in an electronic musical instrument having an output and transmitting and receiving performance information to and from another electronic musical instrument.
About the installation .

[0002]

2. Description of the Related Art An electronic musical instrument such as a synthesizer has an output terminal for performance information in accordance with the MIDI standard, which is a standard common to electronic musical instruments. An electronic musical instrument connected by a signal path conforming to the MIDI standard performs a performance in accordance with performance information received from another electronic musical instrument, and further controls a sound source of another electronic musical instrument according to performance information output by itself. be able to.

In the electronic musical instrument described above, conventionally, M
There is known an apparatus provided with a MIDI monitor for notifying a player of the performance of each IDI channel.
For example, an electronic musical instrument equipped with a keyboard has an LED (light emitting diode) for each channel of 16 MIDI as a MIDI monitor, and responds to a note event output from a keyboard or an external sequencer or a MIDI controller. The LED corresponding to the MIDI channel to which the node event is transmitted is turned on. Therefore, when there is no input of a note event from the outside, the MIDI channel L of the MIDI channel set to the keyboard is set according to the performance of the keyboard.
Since the ED flashes, the player can easily confirm which MIDI channel he is currently playing.

[0004]

However, when a performance is performed by a performance control such as a keyboard attached to the electronic musical instrument while a note event is externally supplied by MIDI, the performance is controlled by the performance control. There is a problem that it is difficult to identify which MIDI channel is present by the above-mentioned conventional MIDI monitor.

[0005] For example, when a performance is performed on a keyboard while a note event of a performance is received from an external multi-track sequencer or the like, a plurality of Ms are played by the sequencer.
Since the performance is performed simultaneously on the IDI channel, the LEDs of a plurality of MIDI monitors are blinking accordingly, and even if an attempt is made to identify the MIDI channel on which one is playing on the keyboard, the condition of the blinking indicates It was difficult to grasp the condition.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a tone signal generator for an electronic musical instrument which can identify an output channel of performance information output from a keyboard while monitoring a MIDI signal. The purpose is.

[0007]

Means for Solving the Problems In order to solve the above problems, according to the present invention, a plurality of logical one signal path
In the musical tone signal generating apparatus for exchanging performance information through those with physical transmission path, the particular route of the plurality of logical transmission path, the performance for outputting Starring Kanade information corresponding to the performance operation and operator, the performance operation with selective information that specifies one of the plurality of logical transmission path
Receives performance information supplied from other than the child receives the performance information receiving means for outputting the supplied performance information to the route in accordance with the designation information, performance information from said plurality of logical transmission path, said and Could pronunciation means a specific tone corresponding to the performance information, for each emitting sound means receives said performance information, and displays the transmission path to which the performance data is transmitted, the performance of the performance operator has output Information is communicated
The specified transmission path and other performance information are transmitted.
And a display unit that sets a display mode different from that of the transmission path.

[0008]

According to the present invention, the performance information output by the performance operator is output to a specific path among a plurality of logical transmission paths. Further, the performance information supplied either from other than playing the selectively addressable information operator before Symbol plurality of logical transmission path is received by the performance information receiving means, supplied performance information above Output to the route according to the specified information. Performance information supplied from a plurality of logical transmission paths is received by the sounding means, and is generated as a specific musical tone corresponding to the performance information. Each time the sounding means receives the performance information, the display means displays the transmission path through which the performance information was transmitted. At the time of this display, the display mode is different between a specific transmission path through which the performance information output by the performance operator is transmitted and a transmission path through which the other performance information is transmitted .

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of one embodiment of the present invention.

[Structure of Embodiment] In FIG.
(Central processing unit) 1 converts the entire electronic musical instrument shown
Control is performed according to a predetermined program stored in M (Read Only Memory) 2. The various processes described in this embodiment are also stored in the ROM 2.
The CPU 1 stores data and the like obtained at the time of performing various controls in a RAM (Random Access Memory).
y) Store in 3. The RAM 3 is also used as a work area for temporarily storing registers, flags, and the like.

The timer 4 generates a reference clock for control and the like, and supplies the clock to the CPU 1.
The keyboard 5 is a keyboard composed of a plurality of black keys and white keys, and supplies performance information (key code, velocity, etc.) corresponding to the performance to the CPU 1 via a bus. M
The IDI interface 6 is a standardized interface used for electronic musical instruments, synthesizers, and the like. A plurality of electronic musical instruments are connected via the MIDI interface 6. According to the MIDI standard, the format of data transmitted through the MIDI signal path is determined in detail, so that even when electronic musical instruments of different models are connected, performance information is accurately transmitted.

Next, the panel 7 includes a 7-segment display 7a and a panel switch 7b provided on the electronic musical instrument main body.
Consists of This panel 7 is shown in FIG. As shown in FIG. 2, the seven-segment display 7a has a three-digit seven-segment L
Consists of ED. Below the 7-segment display 7a, a ten-key TK for inputting data is provided.
Further, LED1 to LED16 indicating the state of each channel for the MIDI monitor are provided below, and switches SW1 to SW16 corresponding to the LED1 to LED16 on a one-to-one basis are provided.

Separately from this, the panel 7 is provided with switches SW17 to SW25 for selecting various types of processing, and switches SW17 to SW25.
LED17 to LED25 are provided adjacent to.
In order from the top, "MON" ... Return processing to the MIDI monitor screen, "KC" ... Keyboard output channel designation processing,
"EC" ... Channel on / off setting processing, "C
V "... channel voice setting processing," CVOL "...
... channel volume setting processing, "CPAN" ... channel pan setting processing, "CREV" ... channel reverb setting processing, "CVIB" ... channel vibrato setting processing, "CTUNE" ... channel detune setting processing is there.

Next, the tone generator 8 generates a tone signal (digital) according to the performance information and tone information supplied via the bus, converts the tone signal into an analog signal, and supplies the analog signal to the speaker SP. The tone signal converted to an analog signal is subjected to processing such as amplification, and then generated by a speaker SP.

[Structure of Event Buffer] Next, the event buffer EB provided in the RAM 3 will be described with reference to the conceptual diagram shown in FIG. The event buffer EB includes EB1 to EBn from buffers corresponding to the number n of events that occur sequentially. Each small buffer has a MIDI channel number in which the event has occurred, the content of the event (ON event / OFF event, and note code). ) And other parameters (such as touches) for that event. Here, the on event represents a key press, and the off event represents a key release. Also,
The note code indicates the pitch of a musical tone corresponding to the pressed key, and the touch indicates the key pressing speed at the time of key pressing.

Although not shown, the RAM 3 is provided with various registers and flags in addition to the buffer described above. For example, the registers CHV1 to CHV
16 stores the voice numbers of the MIDI channels. The flags KCHF1 to KCHF16 are
Each becomes "1" when channel assignment by keyboard is set. Also, flags ECHF1 to ECHF1
When each of the musical tones 6 receives a musical tone of an external sound source supplied through the MIDI interface 6, the value of the musical tone 6 becomes "1".

[Operation of Embodiment] Next, the operation of this embodiment having the above-described configuration will be described with reference to the flowcharts shown in FIGS. When the power is turned on, C
The PU 1 first executes a main routine shown in FIG. In the main routine, initialization of various registers and the like is performed in step SA1. Next, step SA2
To perform key processing for detecting a key press or key release event. In this key processing, an event is detected by scanning a key, and when an event is detected, the channel number indicated by the register KCHF is written into the event buffer EB, and the number of events n equals the number of newly written events. Increase.

Next, the flow advances to step SA3 to execute a multi-track sequencer process for performing sequencer reproduction. In the multi-track sequencer processing, sequencer reproduction (sequencer data is stored in RAM) is performed in accordance with a player's play (start of performance) instruction.
When a note-on or note-off event is reproduced, the event is registered in the event buffer EB, and the number n of events is increased by the number of reproduced events.

Next, the flow advances to step SA4 to perform a MIDI receiving process. In this MIDI receiving process, the MIDI
Data is exchanged from the interface. If note-on or note-off is exchanged, the data is registered in the event buffer EB, and the number of events n is increased in the same manner as the above-described processing. Then, the process proceeds to Step SA5. In step SA5, the sound generation control processing shown in FIGS. 5 and 6 is performed. In the sound generation control process, first, in step SB1 shown in FIG. 5, "1" is set to a variable i. This variable i functions as a counter for referring to n event buffers.

Then, the process proceeds to a step SB2, wherein it is determined whether or not the event number n is "0". Then, if the result of the determination in step SB2 is "YES", the processing routine is terminated and the process returns to the main routine. On the other hand, the determination result in step SB2 is “NO”
, That is, if the event number n is not “0”, the process proceeds to Step SB3. At Step SB3, the contents of the event buffer EBi (1 ≦ i ≦ n) are read.
Then, the read channel number is stored in a variable j,
Further, the event is stored in the buffer BUF, and the parameter is further stored in the buffer PBUF.

Next, the routine proceeds to step SB4, where the flag EC is set.
It is determined whether or not HFj is “1”. If the result of the determination in step SB4 is "NO", that is, if the j-th channel is not in a state in which sound can be emitted, the process proceeds to step SB15. In step SB15,
After decrementing the event number n by one, step SB
Return to 2. Then, in and after step SB2, a tone generation control process for the next event is performed.

On the other hand, if the decision result in the step SB4 is "YES", that is, if the j-th channel can receive sound, a step SB5
Proceed to. In step SB5, the type of the event is determined. If the result of the determination in step SB5 is "note on", the flow proceeds to step SB6. At step SB6, the sound source is instructed to generate a tone corresponding to the note code in the buffer BUF, with the tone of the voice number indicated by the register CHVj, by assigning the tone.

Next, the process proceeds to step SB7 shown in FIG.
It is determined whether or not the flag DISP is “0”. If the result of the determination in step SB7 is "NO", that is, if the state is not the MIDI monitor state, the flow proceeds to step SB15 (see FIG. 5). Step SB15
Then, the number of events n is decremented by one, and the process returns to step SB2. Then, after step SB2,
The sound generation control processing for the next event is performed. On the other hand, if the result of the determination in step SB7 is "YES", that is, if the MIDI monitor is in the state, the process proceeds to step SB8. In step SB8, the clock timer TM
(J) stores the duration time (for example, 0.2 sec as a delay time).

Next, the routine proceeds to step SB9, where the flag KC
It is determined whether or not HFj is “1”. If the result of the determination in step SB9 is "NO", that is, if the LEDj corresponding to the j-th channel is turned off, the process proceeds to step SB10. Step SB1
At 0, the j-th LEDj is turned on to indicate that the j-th MIDI channel is being used.

On the other hand, if the result of the determination in step SB9 is "YES", that is, if the LEDj corresponding to the j-th channel has already been turned on, then step S9 is executed.
Proceed to B11. Then, in step SB11, j
Turn off the LED j. When the processing in step SB10 or SB11 described above ends,
Proceeding to step SB15, the number of events n is decremented by 1, and the process returns to step SB2. Then, in and after step SB2, a tone generation control process for the next event is performed.

On the other hand, if the result of determination in step SB5 is "note off", the flow advances to step SB12.
In step SB12, the same tone code as the note code in the buffer BUF is retrieved from the sounding channel of the sound source with the tone color of the register CHVj and stored in the variable k. Next, the process proceeds to step SB12, where it is determined whether there is a corresponding channel. If the result of the determination in step SB12 is "YES", the control proceeds to step SB14.
Proceed to. In step SB14, a note-off signal is transmitted to the k-th channel of the sound source.

Then, if the above step SB14 has been completed, or if the decision result in the step SB13 is "NO", the process proceeds to a step SB15, where the number of events n is decremented by 1, and the process returns to the step SB2. Then, in and after step SB2, a tone generation control process for the next event is performed. And finally,
When the number of events n becomes “0”, the result of the determination in step SB2 becomes “YES”, the sound generation control process ends, and the process returns to the main routine.

In the main routine, the flow advances to step SA6 to perform a setup process shown in FIG. In the setup process, first, in step SC1, a screen switching switch process is performed. In this screen switching switch process, it is detected whether or not various switches shown in FIG. 2 have been pressed, and an initial process for performing a process corresponding to the pressed switch is performed. For example, when the channel voice setting switch “CV” shown in FIG. 2 is pressed, the processing shown in FIG. 8 is executed.

In this figure, at step SD1, "3" is substituted for a variable DISP and "1" is substituted for a variable j. This variable j indicates the MIDI channel. next,
Proceeding to step SD2, only the j-th LED bj is turned on. Then, the flow advances to step SD3 to display the value of the register CHVj on the seven-segment display 7a. When step SD3 ends, the process ends, and the process returns to the setup process.

In the setup process, the process proceeds to step SC2, where the value of the variable DISP is determined, so that the control flow is distributed to a process corresponding to the value of the variable DISP.
For example, if the variable DISP is “0”, the step S
Proceed to C3. In this step SC3, FIG. 9 and FIG.
A MIDI monitor process shown in FIG. In the MIDI monitor process, first, in step SE1, the variable DIS
It is determined whether or not P is “0”. If the result of the determination in step SE1 is "YES", the flow proceeds to step SE2. In step SE2, it is determined whether or not the timing clock TC is equal to or greater than "1".

On the other hand, if the result of the determination in step SE1 is "NO", that is, if the current display screen is M
If the IDI monitor is in the state, the processing routine is terminated as it is, and the processing returns to the setup processing shown in FIG. 7 and then to the main routine shown in FIG. The timing clock TC is counted up by a timer interrupt routine shown in FIG. 11, which is executed by an interrupt process. The routine is executed at predetermined time intervals,
In step SF1, after the timing clock TC is incremented, the process returns to the normal processing.

If the result of the determination in step SE2 is "YES", the flow proceeds to step SE3. In step SE3, the timing clock TC is incremented, and “1” is substituted for the variable j. This variable j indicates the channel being processed. on the other hand,
If the decision result in the step SE2 is "NO", that is, if the timing clock TC is smaller than "1", the processing routine is ended, and the setup processing shown in FIG. 7 and the main routine shown in FIG. 4 are started. Return.

When the processing of step SE3 is completed,
Next, the process proceeds to step SE4, and determines whether or not the clock timer TM (j) is “0”. And step SE
If the result of the determination in step 4 is "YES", the corresponding channel does not display a MIDI event, and the process proceeds to step SE10. In step SE10, the variable j is incremented, and the process proceeds to step SE11 so that the variable j indicates the next channel. In step SE11, it is determined whether or not the variable j has become larger than “16”. This is, in other words, all MI
This is to determine whether or not processing has been performed on the DI channel. Then, if the decision result in the step SE11 is "NO", that is, if there is still a MIDI channel to be processed, the process returns to the step SE4.

If the result of the determination in step SE4 is "NO", that is, if the channel indicated by the variable j is a channel displaying a MIDI event, the flow proceeds to step SE5. Step S
At E5, the contents of the clock timer TM (j) are decremented. Then, the process proceeds to Step SE6. Step SE6
Then, it is determined whether or not the clock timer TM (j) is “0”. When the result of the determination in step SE6 is "NO", that is, when the clock timer TM (j) is not "0", the flow proceeds to step SE10, the variable j is incremented, and the flow proceeds to step SE11. Here, when the variable j becomes “16” or more, this step SE
The result of the determination at 11 is "YES", the process ends, and the process returns to the setup process shown in FIG. 7 and the main routine shown in FIG.

On the other hand, if the result of the determination in step SE6 is "YES", that is, if the clock timer TM (j) decremented in step SE5 becomes "0", the flow proceeds to step SE7. Step SE7
Then, it is determined whether or not the flag KCHFj is “1”. The result of the determination in step SE7 is "N
If "O", that is, if the channel indicated by the variable j is not driven by the keyboard of the present apparatus, the process proceeds to step SE8. In step SE8, the j-th LEDj
Turn off the light.

On the other hand, if the decision result in the step SE7 is "YES", that is, if the channel indicated by the variable j is driven by the keyboard, the step SE7 is executed.
Go to 9. In step SE9, the j-th LEDj is turned on. Thus, the MID that outputs the performance information of the keyboard
The LED display on the I channel can be
By reversing the display on the monitor, the output channel of the keyboard can be recognized.

When the processing in step SE8 or SE9 is completed, step SE10
Proceed to. In step SE10, after the variable j is incremented, the process proceeds to step SE11. Step SE11
Then, it is determined whether or not the variable j has become larger than “16”. If the result of the determination in step SE11 is "NO", that is, if there is still a MIDI channel to be processed, the process returns to step SE4,
The processing in steps SE4 to SE11 described above is continuously performed.

When the variable j becomes larger than "16" and the result of determination in step SE11 is "YES", it is determined that processing has been performed for all MIDI channels, and the processing is terminated, and the setup shown in FIG. The process then returns to the main routine shown in FIG. In the main routine, the MIDI routine shown in FIG.
Perform monitor screen automatic return processing. In the MIDI monitor screen automatic return processing, first, in step SG1, it is determined whether or not the register DISP is "0". If the result of the determination in step SG1 is "NO", the flow proceeds to step SG2. In step SG2, it is determined whether or not the no-operation state of the panel switch has continued for a predetermined time or more. And this step S
If the result of the determination in G2 is "YES", the flow proceeds to step SG3.

At step SG3, the register DISP is set to "0". Next, the routine proceeds to step SG4, where the flag K
Of the CHF1 to KCHF16, only the LED corresponding to the flag set to “1” is turned on. That is, setting the register DISP to “0” indicates that the display screen is a MIDI monitor,
By turning on only the LEDs corresponding to the flags KCHF1 to KCHF16 that are “1”, M
Change to the IDI monitor screen state. Next, the process proceeds to Step SG5, and “0” is written to all the clock timers TM (1) to TM (16).

On the other hand, if the decision result in the step SG1 is "YES", that is, if the display screen is a MIDI screen automatic display, the process is terminated as it is, and the process returns to the main routine shown in FIG. Also, the above-described step S
When the result of the determination in G2 is "NO", that is, when the panel switch is operated, the process is terminated.
It returns to the main routine shown in FIG.

The MIDI monitor screen automatic return processing routine is also executed when the "MON" switch SW17 shown in FIG. 2 is directly pressed. That is,
If the switch SW17 is pressed, step SG
After "0" is written in the register DISP in step 3, the process proceeds to step SC4. Then, in step SC4 and step SC5, each of the LEDs 1 to 16 corresponding to the flag of “1” among the flags KCH1 to KCHF16 is turned on, similarly to the above-described processing, and the clock timer TM (1) ) To TM (16) are all written with "0". Then, the MIDI monitor screen automatic return process routine ends, and the process returns to the main routine.

In the main routine after the above-described MIDI monitor screen automatic return writing process, the process proceeds to step SA8. In step SA8, the variable n is set to "0", and the process returns to step SA2. Then, the above-described step SA2
To SA8 are repeatedly executed. Next, another process in the setup process shown in FIG. 7 will be described.
For example, when the register DISP is “1” in step SC2, the process proceeds to step SC4. In step SC4, a keyboard MIDI channel setting process is performed. That is, among the flags KCHF1 to KCHF16, the flag corresponding to the keyboard output channel is set to “1”, and the LED corresponding to the flag is turned on. When one of the switches SW1 to SW16 shown in FIG. 2 is turned on, the on / off state of the LED corresponding to the switch is inverted.

If it is determined in step SC2 that the register DISP is "2", the flow advances to step SC5.
In step SC5, the sound source MIDI channel is turned on / off. That is, the flags ECHF1 to ECHF1 to E
In the CHF 16, a flag corresponding to the channel for receiving the output of the sound source is set to “1”, and the LED corresponding to the flag is turned on. The switch SW shown in FIG.
When any one of the switches 1 to 16 is turned on, the on / off state of the LED corresponding to the switch is inverted.

In step SC6, the sound source MIDI channel / voice processing shown in FIG. 13 is performed. In this process, the MIDI channel corresponding to the switch SW1 to SW16 is set as a voice channel by one (or a plurality of switches) of the switch SW1 to SW16. In the figure, first, in step SH1, a variable i
Is written with the numerical values corresponding to the switches SW1 to SW16. For example, when the switch SW5 is pressed, “5” is written in the variable i. Next, step SH2
Then, only the i-th LEDi is turned on. Then, the process proceeds to a step SH3, wherein the value of the register CHVi, that is, the voice number, is displayed on the 7-segment display 7a. Then, the process ends, the process returns to the setup process routine, and further returns to the main routine.

If the register DISP is "4" in step SC2 shown in FIG.
Proceed to C7. In step SC7, a sound source MIDI channel volume setting process is performed. In this process, the volume of the channel corresponding to the pressed switches SW1 to SW16 is set. The volume level being set is displayed on the 7-segment display 7a.

As other settings in step SC8, for example, there is a process of setting various parameters using a ten-key and a 7-segment display 7a.
For example, there is a numeric keypad input routine shown in FIG. In this routine, first, in step SI1, corresponding to the pressed switches SW1 to SW16,
Register CHVi indicating the voice number (i is the switch SW
1 to SW16) is written with the value input from the numeric keypad TK. Next, the process proceeds to step SI2, where the contents of the register CHVi are displayed on the 7-segment display 7a.

[0047]

Effect of the Invention] As described above, according to the present invention, also has a plurality of logical transmission paths into one signal path
In a tone signal generator for transmitting and receiving performance information through a plurality of logical transmission paths,
And the performance operator to output the performance information in accordance with the performance operation, before
Optionally with information that specifies one of the serial plurality of logical transmission path receives the performance information supplied from other than the performance operator, the supply of the route in accordance with the designation information
A performance information receiving means for outputting performance information, receives the performance information from said plurality of logical transmission paths, and Could sound means a specific tone corresponding to the performance information, emitting sound means the performance information each receive, said along with performance information to display the transmission path is transmitted, the transmission path in which the performance operator output to the particular transmission path performance information is transmitted with the other playing information is transmitted Since a display means having a display mode different from that of the above is provided, there is an advantage that the output channel of the performance information output from the keyboard can be identified while monitoring the MIDI signal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of one embodiment of the present invention.

FIG. 2 is a front view showing an example of the panel surface of the present embodiment.

FIG. 3 shows an event buffer EB provided in a RAM 3
FIG.

FIG. 4 is a flowchart of a main routine for explaining the operation of the present embodiment.

FIG. 5 is a flowchart of a tone generation control processing routine for explaining the operation of the present embodiment.

FIG. 6 is a flowchart of the same sound generation control processing routine.

FIG. 7 is a flowchart of a setup processing routine for explaining the operation of the present embodiment.

FIG. 8 is a flowchart of a channel voice setting routine in the setup processing routine shown in FIG. 7;

FIG. 9 is a flowchart of a MIDI monitor processing routine for explaining the operation of this embodiment.

FIG. 10 is a flowchart of the MIDI monitor processing routine.

FIG. 11 is a flowchart of a timer interrupt routine for explaining the operation of this embodiment.

FIG. 12 is a MIDI diagram for explaining the operation of this embodiment.
It is a flowchart of a monitor screen automatic return processing routine.

FIG. 13 is a flowchart of a screen changeover switch processing routine in a setup processing routine for explaining the operation of this embodiment.

FIG. 14 is a flowchart of another setting processing routine in step SC8 in the setup processing routine for explaining the operation of this embodiment.

[Explanation of symbols]

1 ... CPU (performance information receiving means) 2 ... ROM 3
… RAM, 5… keyboard (performance controls), 6… MID
I interface (signal path) 7a 7-segment display (display means) 7b Panel switch 8
Sound source (pronunciation means ).

Claims (1)

(57) [Claims] 1. A tone signal generator for exchanging performance information via the one having a plurality of logical transmission paths into one signal path
In the device, the particular route of the plurality of logical transmission path, selectively specify the performance operator for outputting performance information corresponding to the performance operation, any of the plurality of logical transmission path together with information that receives performance information supplied from other than the performance operator, the supply to the path in accordance with the designation information
A performance information receiving means for outputting performance information, receives performance information from said plurality of logical transmission path, Could voicing section and, emitting sound means the performance information specific tone corresponding to the performance information Every time the performance information is transmitted, the transmission path through which the performance information is transmitted is displayed, and the specific transmission path through which the performance information output by the performance operator is transmitted, and the transmission path through which the other performance information is transmitted. musical tone signal generating apparatus characterized by comprising a display means for the display mode different between.